Rubber clones’ evaluation involves assessment of latex yield and performance stability across multiple locations. Clones with high yield and stability have the potential for wide planting across country, while unstable clones with high yield can be exploited in certain localities. Forty-five rubber clones were evaluated in five locations across Malaysia in the period between 2000 and 2011. There was a significant genotype by environment interaction effect on rubber yield, accounting 26.67% of total variation. Assessment of locations suitability for clone trial led to discovery of two mega-environments, which we predicted to form due to the level of agronomic inputs. Using the data from nine clones, PB 260 was shown to give the best performance compared to other clones in a low input environment. Two methods of stability analyses were used viz. linear regression and mean and coefficient of variation. The former method gave more confidence in the classification of stable clones due to its more systematic and stringent approach. Six clones were classified as stable, i.e., PB 374, PB 371, RRIM 2004, PB 260, RRIM 2001, and RRIM 2002, while three clones render more evaluation to confirm their stability, namely, RRIM 2007, RRIM 3001 and RRIM 2024. Four clones that were shown unstable but high yielding have the potential for planting in targeted region and these are RRIM 2005, PB 373, RRIM 2023 and PB 369.

橡胶克隆的评估涉及评估多个位置的乳胶产量和性能稳定性。高产、稳定的无性系具有在全国广泛种植的潜力，而不稳定的高产无性系可在部分地区开发利用。2000 年至 2011 年期间，在马来西亚 5 个地点评估了 45 个橡胶无性系。环境相互作用对橡胶产量影响显着的基因型，占总变异的 26.67%。对克隆试验地点适宜性的评估导致发现了两个大型环境，我们预测由于农艺投入水平而形成。使用来自九个克隆的数据，与其他克隆相比，PB 260 在低输入环境中表现出最佳性能。使用了两种稳定性分析方法，即. 线性回归和均值和变异系数。前一种方法由于其更系统和更严格的方法，因此对稳定克隆的分类更有信心。六个克隆归类为稳定，即， PB 374，PB 371，2004年RRIM，PB 260，RRIM 2001年和2002年RRIM，而三个克隆呈现更多的评价，以确认其稳定性，即RRIM 2007年，RRIM 3001和RRIM 2024 . 显示不稳定但高产的四个克隆具有在目标区域种植的潜力，它们是 RRIM 2005、PB 373、RRIM 2023 和 PB 369。